Work vehicles

Abstract

To provide a work vehicle that allows for easy repositioning of a position detection device. [Solution] The system comprises a position detection device 100 capable of detecting the position of the vehicle body, a support frame 300 that supports the position detection device 100 and is arranged to span the left and right pillars 12 of the cabin 10, and connecting parts (first connecting part 400, second connecting part 500) that rotatably connect the support frame 300 to each of the left and right pillars 12.

Description

Technical Field

[0001] The present invention relates to the technology of work vehicles.

Background Art

[0002] Conventionally, the technology of work vehicles equipped with a position detection device capable of detecting the position of a vehicle body has become known. For example, it is as described in Patent Document 1.

[0003] Patent Document 1 describes a tractor provided with an antenna unit capable of detecting the position of a vehicle body by receiving a radio wave signal from a positioning satellite constituting a satellite positioning system. The antenna unit is attached so as to be located at the center in the left - right direction of a cabin. Further, the antenna unit is rotatably attached between a normal use position protruding above the roof of the cabin and a non - use position lower than the roof.

[0004] In the tractor described in Patent Document 1, when changing the position of the antenna unit, it is necessary for an operator to rotate the antenna unit by hand and fix the antenna unit at the changed position. Here, since the antenna unit is located at the center in the left - right direction of the cabin, it is in a position difficult to reach by an operator standing on the side of the tractor. Therefore, when performing the work of changing the position, it is considered that the work of changing the position of the antenna unit is difficult, such as the operator having to use a stepladder or the like to perform the work.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] One aspect of this disclosure has been made in view of the above circumstances, and the problem it seeks to solve is to provide a work vehicle that can easily change the position of a position detection device. [Means for solving the problem]

[0007] The problem that one aspect of this disclosure aims to solve is as described above, and the means for solving this problem will now be explained.

[0008] A work vehicle according to one aspect of the present disclosure comprises a cabin having a roof, a position detection device capable of detecting the position of the vehicle body, a support frame that supports the position detection device and is provided on the cabin, and a connecting portion that connects the support frame to the cabin, wherein the first portion of the support frame that supports the position detection device is located in front of both left and right ends of the support frame that are connected to the connecting portion.

[0009] The support frame according to one aspect of the present disclosure is formed of a rod-shaped member and comprises a second portion formed to extend rearward from the first portion.

[0010] The support frame according to one aspect of the present disclosure comprises a third portion formed to extend from the second portion in a left-right direction.

[0011] The support frame according to one aspect of the present disclosure supports the position detection device such that the position detection device is located above the connecting portion.

[0012] The support frame according to one aspect of the present disclosure supports the position detection device such that, in a plan view, the position detection device and the sunroof formed on the roof do not overlap.

[0013] The support frame according to one aspect of the present disclosure supports the position detection device such that, in a plan view, the position detection device and the roof do not overlap.

[0014] The support frame according to one aspect of the present disclosure supports the position detection device such that the position detection device is located above the roof.

[0015] The support frame according to one aspect of the present disclosure is rotatable between a usage position in which the position detection device is located above the roof and a non-usage position in which the position detection device is located below the roof.

[0016] The support frame according to one aspect of the present disclosure is arranged to span across the left and right pillars that support the roof of the cabin.

[0017] The connecting portion according to one aspect of the present disclosure rotatably connects the support frame to each of the left and right pillars.

[0018] A work vehicle according to one aspect of the present disclosure is provided in the cabin and includes an outlet for bringing wiring connected to the position detection device from the inside to the outside of the cabin, wherein the outlet is located in a region between a first imaginary line connecting the axis of the pivot axis of the support frame and the side view center of the part of the support frame at the working position, and a second imaginary line connecting the axis of the pivot axis and the side view center of the part of the support frame at the non-working position.

[0019] A work vehicle according to one aspect of the present disclosure comprises a cover member provided on the support frame and covering at least a portion of the wiring, wherein the cover member comprises upper and lower cover bodies attached to the upper and lower surfaces of a rod-shaped main body provided on the support frame, and a space is formed between the upper and lower cover bodies for inserting the wiring in the left-right direction.

[0020] The second portion relating to one aspect of this disclosure is bent to avoid contact with the muffler. [Effects of the Invention]

[0021] According to one aspect of the present disclosure, the position of the position detection device can be easily changed.

Brief Description of the Drawings

[0022] [Figure 1] A side view showing the overall configuration of a tractor according to one aspect of the present disclosure. [Figure 2] A perspective view showing the cab, position detection device, and support mechanism of the tractor. [Figure 3] An enlarged perspective view showing the right side portion of the support mechanism. [Figure 4] An enlarged perspective view showing the left side portion of the support mechanism. [Figure 5] A plan view showing the position detection device and the support mechanism. [Figure 6] An exploded perspective view showing the position detection device and the support mechanism. [Figure 7] An enlarged exploded perspective view showing the right side portion of the support mechanism. [Figure 8] An enlarged exploded perspective view showing the left side portion of the support mechanism. [Figure 9] A left side view showing the position detection device and the support mechanism in the use position. [Figure 10] A left side view showing the position detection device and the support mechanism in the non-use position. [Figure 11] A right side view showing the beam, wiring, position detection device, and support mechanism. [Figure 12] A right side view schematically showing the beam outlet and the support frame. [Figure 13] A perspective view showing the cab, position detection device, and support mechanism of the tractor according to the modified example.

Modes for Carrying Out the Invention

[0023] <O000116>Hereinafter, the directions indicated by the arrows U, D, F, B, L, and R in the drawings will be defined as the upward, downward, forward, backward, leftward, and rightward directions, respectively, for the description.

[0024] First, the overall configuration of tractor 1 according to one aspect of this disclosure will be described.

[0025] The tractor 1 shown in Figure 1 mainly consists of a machine frame 2, engine 3, bonnet 4, transmission case 5, front wheels 6, rear wheels 7, fenders 8, lifting device 9, cabin 10, seat 20, and steering wheel 21, etc.

[0026] The machine frame 2 is a frame-like member formed by appropriately combining multiple plate materials. The machine frame 2 is formed in a roughly rectangular shape when viewed from above. The machine frame 2 is positioned at the front of the tractor 1 with its longitudinal direction facing the front-to-back direction. The engine 3 is fixed to the rear of the machine frame 2. The engine 3 is covered by a bonnet 4. The transmission case 5 is fixed to the rear of the engine 3. A muffler 4a for discharging exhaust gas from the engine 3 is located on the right side of the bonnet 4.

[0027] The front of the aircraft frame 2 is supported by a pair of front wheels 6 via a front axle mechanism (not shown). The rear of the transmission case 5 is supported by a pair of rear wheels 7 via a rear axle mechanism (not shown). The pair of rear wheels 7 are covered from above by fenders 8.

[0028] A lifting device 9 is provided at the rear of the transmission case 5. Various work devices (for example, a tiller, etc.) can be attached to the lifting device 9. The lifting device 9 can raise and lower the attached work devices using actuators such as hydraulic cylinders. Power from the engine 3 can be transmitted to the lifting device 9 via a PTO shaft (not shown).

[0029] The power from engine 3 is shifted by a transmission (not shown) housed in the transmission case 5, and then transmitted to the front wheels 6 via the front axle mechanism, and also to the rear wheels 7 via the rear axle mechanism. The power from engine 3 rotates the front wheels 6 and rear wheels 7, allowing the tractor 1 to move. The power from engine 3 can also drive the work equipment mounted on the lifting device 9.

[0030] A cabin 10 is located behind the engine 3. The cabin 10 is mounted on the vehicle body (transmission case 5, etc.). Inside the cabin 10, a living space is formed where the driver sits.

[0031] As shown in Figure 2, the cabin 10 has left and right pillars (front pillars) 12 that support the roof 11 at the front. Fixing pieces 12a are provided at the midpoint of the left and right pillars 12 in the vertical direction for fixing the first connecting portion 400 and the second connecting portion 500, which will be described later. The fixing pieces 12a are formed in a substantially plate shape with their thickness direction generally oriented in the front-rear direction.

[0032] Furthermore, as shown in Figure 5, the cabin 10 has a beam 13 that connects the upper ends of the left and right pillars 12. Note that the roof 11 and other parts of the cabin 10 are not shown in Figure 5. A windshield is provided within the frame formed by the beam 13 and the left and right pillars 12. An outlet 13a is formed in the beam 13 for routing wiring 110, which will be connected to a position detection device 100 (described later), from the inside to the outside of the cabin 10. The outlet 13a is formed to penetrate the beam 13 in the front-rear direction. The outlet 13a is formed on the right side of the beam 13. In addition, multiple outlets 13a are formed (two in the illustrated example) spaced apart in the left-right direction.

[0033] As shown in Figure 1, a seat 20 for the driver is positioned approximately in the center of the cabin 10. The cabin 10 is also provided with an auxiliary step 20a for getting in and out of the seat 20. The auxiliary step 20a is installed at least on the left side of the cabin 10. Note that the auxiliary step 20a can be installed on both sides of the cabin 10. A steering wheel 21 for adjusting the steering angle of the front wheels 6 is positioned at the front of the cabin 10.

[0034] As shown in Figure 2, the tractor 1 is equipped with a position detection device 100 capable of detecting the position of the vehicle body and a support mechanism 200 that supports the position detection device 100. The details of the position detection device 100 and the support mechanism 200 will be described below using Figures 2 to 8.

[0035] The position detection device 100 shown in Figure 2 is a device capable of detecting the position of the vehicle (including position information such as latitude and longitude) using a satellite positioning system such as GPS. The position detection device 100 is formed in the shape of a roughly rectangular box. The position detection device 100 has appropriate receiving means for receiving satellite signals transmitted from satellites. The position detection device 100 is installed so as to be located outside the cabin 10. Specifically, the position detection device 100 is positioned so as to be located approximately in the center in the left-right direction at the front of the roof 11.

[0036] As shown in Figure 5, the position detection device 100 is connected to wiring 110 that is brought out from inside the cabin 10 through an outlet 13a. In the illustrated example, the wiring 110 is connected to the right side of the position detection device 100. Multiple wirings 110 are provided. The position detection device 100 and an appropriate control device capable of controlling the movement of the tractor 1 can be communicated through the wiring 110.

[0037] The tractor 1 is capable of automatically steering the vehicle based on the position information detected by the position detection device 100. This control includes, for example, automatically steering the vehicle so that it moves in a straight line parallel to a set predetermined driving reference line.

[0038] The support mechanism 200 is attached to the cabin 10 and supports the position detection device 100. The support mechanism 200 comprises a support frame 300, a first connecting portion 400, and a second connecting portion 500.

[0039] The support frame 300 shown in Figures 5 to 8 supports the position detection device 100 and is positioned to span the left and right pillars 12. The support frame 300 is positioned in front of the roof 11. The support frame 300 is rotatable relative to the left and right pillars 12 around a central axis (rotation axes 322 and 336, described later) that faces left and right, via a first connecting portion 400 and a second connecting portion 500, which will be described later.

[0040] Specifically, the support frame 300 is rotatable between a usage position (see Figure 9) where the position detection device 100 is located above the roof 11 (the upper end of the roof 11), and a non-usage position (see Figure 10) where the support frame 300 is rotated counterclockwise from the usage position in a left side view so that the position detection device 100 is located below the roof 11. A detailed explanation of the rotation operation of the support frame 300 will be given later. Below, the configuration of the support frame 300 will be described with reference to the usage position. The support frame 300 comprises a main body 310, a first end 320, a second end 330, a support plate 340, and a cover 350.

[0041] The main body portion 310 shown in Figures 5 and 8 is the main structure of the support frame 300. The main body portion 310 is formed by bending a long, rod-shaped (round bar) member in the left-right direction. For example, a hollow round bar (pipe) can be used as the main body portion 310. As shown in Figure 5, the main body portion 310 is formed so that both ends in the left-right direction (the ends of the third portion 313, which will be described later) are located outward in the left-right direction from the left and right pillars 12 (the parts of the pillars 12 that are at approximately the same height as the support frame 300). The main body portion 310 comprises a first portion 311, a second portion 312, and a third portion 313.

[0042] The first portion 311 is the central part of the main body 310 in the left-right direction. The first portion 311 is formed to extend in the left-right direction. As shown in Figure 5, when the position detection device 100 is in the operating position, the central part of the first portion 311 is formed to be recessed towards the rear in the left-right direction. More specifically, the central part of the first portion 311 is formed to be recessed diagonally downward and rearward relative to both ends in the left-right direction (see Figure 11). In addition, the first portion 311 is formed in a straight line except for the central part in the left-right direction.

[0043] The second portion 312 is a portion that extends to the left and right from both ends of the first portion 311 in the left-right direction. The second portion 312 is formed to extend diagonally downward and rearward. As shown in Figure 5, in this embodiment, of the left and right second portions 312, the second portion 312 on the muffler 4a side (right side) is bent to avoid contact with the muffler 4a. That is, in this embodiment, the right second portion 312 is formed in a shape that is bent so as to be concave toward the opposite side of the muffler 4a (diagonally left rearward in a plan view). Furthermore, as shown in Figure 11, the right second portion 312 is formed to be concave diagonally upward and rearward in a right side view. This makes it possible to avoid interference between the support frame 300 (second portion 312) and the muffler 4a.

[0044] The third portion 313 is a portion that extends to the left and right from both ends of the second portion 312 in the left-right direction. The third portion 313 is formed to extend linearly in the left-right direction. The left and right third portions 313 are formed to be located substantially coaxially with each other.

[0045] As described above, the main body portion 310 is formed in an asymmetrical shape. Specifically, the right-side second portion 312 of the main body portion 310 is bent to avoid contact with the muffler 4a, while the left-side second portion 312 is not bent and is formed in a straight line. In this embodiment, the shape of the main body portion 310 (second portion 312) is arbitrarily changed to avoid interference with other members. As in this embodiment, if the left and right third portions 313 of the main body portion 310 are located substantially coaxially with each other, the shape and size of the intermediate portion (first portion 311 and second portion 312) can be arbitrarily changed. This improves the design flexibility of the tractor 1.

[0046] The first end portion 320 shown in Figures 3 and 7 constitutes the right end portion of the support frame 300. The first end portion 320 is formed in a substantially plate shape with its thickness direction oriented in the left-right direction. In side view, the first end portion 320 is formed in a substantially circular shape. The first end portion 320 is fixed to the right end portion of the main body portion 310 (third portion 313). The first end portion 320 is equipped with a shaft mounting hole 321 and a pivot shaft 322.

[0047] The shaft mounting hole 321 is a part (screw hole) to which the pivot shaft 322, described later, is attached. The shaft mounting hole 321 is formed to penetrate the first end portion 320 in the left-right direction. The shaft mounting hole 321 is formed at the center of the first end portion 320 when viewed from the side. The shaft mounting hole 321 is formed so as to roughly coincide with the center of the third portion 313 when viewed from the side.

[0048] The pivot shaft 322 is the pivot center on the right side of the support frame 300. The pivot shaft 322 is positioned with its axial direction oriented to the left and right. The pivot shaft 322 is formed by appropriate bolts (stud bolts). The pivot shaft 322 is fitted into the shaft mounting hole 321.

[0049] The second end portion 330 shown in Figures 4 and 8 constitutes the left end portion of the support frame 300. The second end portion 330 is formed in a substantially plate shape with its thickness direction oriented in the left-right direction. In a side view, the second end portion 330 is formed in a substantially circular shape with a portion (the projection 334 described later) protruding. The second end portion 330 is formed in a shape that is generally similar to that of the first end portion 320, except for the fact that a portion protrudes. The second end portion 330 is equipped with a shaft mounting hole 331, a first fixing hole 332, a second fixing hole 333, a projection 334, a regulating pin 335, and a pivot shaft 336.

[0050] The shaft mounting hole 331 is the part (screw hole) to which the pivot shaft 336, described later, will be attached. The configuration of the shaft mounting hole 331 is generally the same as that of the shaft mounting hole 321 of the first end portion 320, so a detailed explanation will be omitted.

[0051] The first fixing hole 332 is for fixing the second end portion 330 to the second connecting portion 500, which will be described later, when fixing the support frame 300 in the position of use. The first fixing hole 332 is formed to penetrate the second end portion 330 in the left-right direction. The second end portion 330 is formed in pairs, with the shaft mounting hole 331 in between.

[0052] The second fixing hole 333 is for fixing the second end portion 330 to the second connecting portion 500, which will be described later, when fixing the support frame 300 in a non-use position. The second fixing hole 333 is formed to penetrate the second end portion 330 in the left-right direction, similar to the first fixing hole 332. The second end portion 330 is formed in pairs, flanking the shaft mounting hole 331. The first fixing hole 332 and the second fixing hole 333 are formed to be aligned on a circumference centered on the shaft mounting hole 331.

[0053] The projection 334 is a portion that protrudes approximately upward (diagonally upward) from the approximately circular portion of the second end 330.

[0054] The regulating pin 335 is the portion that protrudes to the left from the tip of the projection 334. The regulating pin 335 is formed in a substantially cylindrical shape with its axis oriented in the left-right direction.

[0055] The pivot shaft 336 is the pivot center on the left side of the support frame 300. The pivot shaft 336 is positioned with its axial direction oriented to the left and right. The pivot shaft 336 is fitted into the shaft mounting hole 331. The pivot shaft 336 is formed to have the same outer diameter as the right-side pivot shaft 322.

[0056] The support plate 340 shown in Figure 6 supports the position detection device 100. The support plate 340 is provided in the left-right central part of the main body 310 (the left-right central part of the first part 311). When the position detection device 100 is in the operating position, the support plate 340 is formed in a substantially plate shape with its thickness direction oriented vertically. The support plate 340 is fixed to the main body 310, for example, by welding. The support plate 340 is also fixed to the bottom surface of the position detection device 100 using fasteners such as bolts.

[0057] The cover portion 350 shown in Figures 3 and 7 is provided on the main body portion 310 and covers at least a part of the wiring 110. In a plan view, the cover portion 350 is formed in a substantially rectangular shape that is elongated in the left-right direction. The cover portion 350 is provided on the right side of the main body portion 310. More specifically, the cover portion 350 is provided on the portion of the first part 311 of the main body portion 310 that is to the right of the support plate 340. The cover portion 350 is also provided on the rear side of the first part 311. The cover portion 350 comprises a lower cover portion 351, a cover fixing portion 352, and an upper cover portion 353.

[0058] The lower cover portion 351 is a part provided at the lower part of the main body portion 310 (first portion 311). When the position detection device 100 is in the operating position, the lower cover portion 351 is formed in a substantially plate shape with its thickness direction oriented vertically. More specifically, the lower cover portion 351 is formed in a shape in which the rear end of a plate-shaped member is bent upward. The lower cover portion 351 is fixed to the lower surface of the first portion 311, for example, by welding.

[0059] The cover fixing portion 352 is a part for fixing the upper cover portion 353, which will be described later. The cover fixing portion 352 has screw holes through which fasteners such as bolts can be inserted vertically. Multiple cover fixing portions 352 (three in the illustrated example) are provided on the upper surface of the main body portion 310 (first portion 311) at intervals in the left-right direction. The cover fixing portion 352 is fixed to the upper surface of the first portion 311, for example, by welding.

[0060] The upper cover portion 353 is a part provided on the upper part of the main body portion 310 (first portion 311). When the position detection device 100 is in the operating position, the upper cover portion 353 is formed in a substantially plate shape with its thickness direction oriented vertically. The upper cover portion 353 is formed separately from the main body portion 310. The upper cover portion 353 is attached to the cover fixing portion 352 using fasteners such as bolts.

[0061] The first connecting portion 400 shown in Figures 3 and 7 rotatably connects the right end of the support frame 300 to the right pillar 12. The first connecting portion 400 is provided on the fixing piece 12a of the right pillar 12. The first connecting portion 400 comprises a fixing member 410, a support member 420, and a friction force application mechanism 430.

[0062] The fixing member 410 is fixed to the fixing piece 12a of the pillar 12, and a support member 420, which will be described later, is attached to it. The fixing member 410 is formed by bending a plate-shaped member into a substantially L-shape. The fixing member 410 comprises a first fixing piece 411 and a second fixing piece 412.

[0063] The first fixing piece 411 is the part that is fixed to the fixing piece 12a. The first fixing piece 411 is formed so that its thickness direction is generally oriented in the front-to-back direction. The first fixing piece 411 is fixed to the fixing piece 12a using fasteners such as bolts, with its rear surface in contact with the front surface of the fixing piece 12a.

[0064] The second fixing piece 412 is the portion to which the support member 420 is attached. The second fixing piece 412 is formed to extend substantially backward from the upper end of the first fixing piece 411. The second fixing piece 412 is formed so that its thickness direction is generally oriented in the vertical direction.

[0065] The support member 420 is attached to the fixing member 410 and rotatably supports the right end of the support frame 300. The support member 420 is formed by bending a plate-shaped member into a substantially L-shape. The support member 420 comprises a first support piece 421 and a second support piece 422.

[0066] The first support piece 421 is the portion of the fixing member 410 that is fixed to the second fixing piece 412. The first support piece 421 is formed so that its thickness direction is generally oriented in the vertical direction. The first support piece 421 is fixed to the second fixing piece 412 using fasteners such as bolts, with its lower surface in contact with the upper surface of the second fixing piece 412.

[0067] The second support piece 422 is a portion that rotatably supports the right end (first end 320) of the support frame 300. The second support piece 422 is formed to extend upward from the right end of the first support piece 421. The second support piece 422 is formed so that its thickness direction is oriented in the left-right direction. The second support piece 422 is formed in a substantially rectangular shape in a side view. The upper end of the second support piece 422 is formed in an arc shape that protrudes upward from the left-right center. The second support piece 422 is provided with a support hole 422a.

[0068] The support hole 422a is through which the pivot shaft 322 of the support frame 300 is inserted and also rotatably supports the right end of the support frame 300. The support hole 422a is formed to penetrate the second support piece 422 in the left-right direction. The inner diameter of the support hole 422a is formed to be larger than the outer diameter of the pivot shaft 322. The support hole 422a is formed approximately in the center of the second support piece 422 when viewed from the side.

[0069] The friction force applying mechanism 430 applies friction force to the rotation of the support frame 300. The friction force applying mechanism 430 is provided on the right side of the second support piece 422. The friction force applying mechanism 430 comprises a friction plate 431, a washer 432, a spring portion 433, a spring receiving portion 434, and a case 435.

[0070] The friction plate 431 is for generating frictional force with the right surface of the second support piece 422. The friction plate 431 is formed in a substantially annular shape. The friction plate 431 is fitted onto the pivot shaft 322.

[0071] The washer 432 transmits the biasing force of the spring portion 433, which will be described later, to the friction plate 431. The washer 432 is formed in a substantially annular shape. The washer 432 is fitted onto the pivot shaft 322 and contacts the right side of the friction plate 431.

[0072] The spring portion 433 is for biasing the washer 432 and friction plate 431 to the left. The spring portion 433 is formed from a compression coil spring. The spring portion 433 is fitted onto the pivot shaft 322 and contacts the left side of the washer 432.

[0073] The spring support portion 434 is for receiving the spring portion 433. The spring support portion 434 is formed in a substantially annular shape. The spring support portion 434 is fitted onto the pivot shaft 322 and abuts against the right side of the spring portion 433. The spring support portion 434 is also held on the pivot shaft 322 by a nut 322a fastened to the pivot shaft 322. By appropriately changing the fastening position of the nut 322a, the frictional force applied when the support frame 300 rotates can be adjusted.

[0074] The case 435 covers the other components of the friction force application mechanism 430 (friction plate 431, washer 432, spring portion 433, spring support portion 434) and the pivot shaft 322. The case 435 is formed in a roughly box shape with an opening to the left.

[0075] The second connecting portion 500 shown in Figures 4 and 8 rotatably connects the left end of the support frame 300 to the left pillar 12. The second connecting portion 500 is provided on the fixing piece 12a of the left pillar 12. The second connecting portion 500 comprises a fixing member 510 and a support member 520.

[0076] The fixing member 510 is fixed to the fixing piece 12a of the pillar 12, and a support member 520, which will be described later, is attached to it. The fixing member 510 comprises a first fixing piece 511 and a second fixing piece 512. Note that the fixing member 510 (first fixing piece 511 and second fixing piece 512) is generally the same as the fixing member 410 (first fixing piece 411 and second fixing piece 412), except that it is formed in a shape that is symmetrical in the left-right direction, so a detailed explanation will be omitted.

[0077] The support member 520 is attached to the fixing member 510 and rotatably supports the left end of the support frame 300. The support member 420 is formed by bending a plate-shaped member into a substantially L-shape. The support member 520 comprises a first support piece 521 and a second support piece 522.

[0078] The first support piece 521 is the portion of the fixing member 510 that is fixed to the second fixing piece 512. The first support piece 521 is formed so that its thickness is generally oriented in the vertical direction. The first support piece 521 is fixed to the second fixing piece 512 using fasteners such as bolts, with its lower surface in contact with the upper surface of the second fixing piece 512.

[0079] The second support piece 522 is a portion that rotatably supports the left end (second end 330) of the support frame 300. The second support piece 522 is formed to extend upward from the left end of the first support piece 521. The second support piece 522 is formed so that its thickness direction is oriented in the left-right direction. The second support piece 522 is formed in a substantially rectangular shape in a side view. The left-right central part of the upper end of the second support piece 522 is formed in an arc shape centered on the support hole 522a, causing it to protrude upward. The second support piece 522 comprises a support hole 522a, a fixing hole 522b, a first restricting portion 522c, and a second restricting portion 522d.

[0080] The support hole 522a is through which the pivot shaft 336 of the support frame 300 is inserted and also rotatably supports the left end of the support frame 300. The support hole 522a is formed to penetrate the second support piece 522 in the left-right direction. The support hole 522a is formed approximately in the center of the second support piece 522 in a side view. The inner diameter of the support hole 522a is formed to be larger than the inner diameter of the support hole 422a of the first connecting portion 400. As a result, the gap between the support hole 522a and the pivot shaft 336 inserted through the support hole 522a is larger than the gap between the support hole 422a and the pivot shaft 322 inserted through the support hole 422a.

[0081] The fixing holes 522b are used to fix the support frame 300 (second end 330) in the usage position or non-usage position. In a side view, the fixing holes 522b are formed in pairs such that they overlap with the pair of first fixing holes 332 of the support frame 300 (second end 330) in the usage position and with the pair of second fixing holes 333 of the support frame 300 (second end 330) in the non-usage position (see Figures 9 and 10). The pair of fixing holes 522b are formed in the shape of elongated holes extending along the circumference of a circle with the pivot center of the support frame 300 (axis of the pivot shaft 336) as its center. The support frame 300 and the support member 520 are fixed in the usage position or non-usage position by fixing bolts and nuts inserted through the fixing holes 522b and the first fixing holes 332 or the second fixing holes 333.

[0082] The first restricting portion 522c restricts the rotation of the support frame 300 in the usage position. The first restricting portion 522c is formed on the upper surface of the rear part (the rear part of the arc-shaped portion) of the second support piece 522. When the restricting pin 335 of the support frame 300 comes into contact with the first restricting portion 522c, further rotation of the support frame 300 in the clockwise direction when viewed from the left side in the usage position is restricted (see Figure 9).

[0083] The second restricting portion 522d restricts the rotation of the support frame 300 in the unused position. The second restricting portion 522d is formed on the upper surface of the front part (the rear part of the arc-shaped portion) of the second support piece 522. When the restricting pin 335 of the support frame 300 comes into contact with the second restricting portion 522d, further rotation of the support frame 300 in the left side view counterclockwise direction in the unused position is restricted (see Figure 10).

[0084] Next, using Figures 9 and 10, we will explain the operation of rotating the support mechanism 200 (support frame 300) to change the position detection device 100 between the operating position and the non-operating position.

[0085] First, we will explain the operation of changing the position detection device 100 from the position of use to the position of non-use.

[0086] Figure 9 shows the position detection device 100 in the operating position. In this state, the second end 330 of the support frame 300 at the operating position is fixed to the second connecting portion 500 by fixing bolts and nuts. Note that the bolts and nuts are not shown in Figures 9 and 10.

[0087] When in the operating position, the upper end of the position detection device 100, which is fixed to the support frame 300, is located above the upper end (highest part) of the roof 11 of the cabin 10 (see Figure 1). In the operating position, the support mechanism 200 can support the position detection device 100 in a position (attitude) that is suitable for detecting the position of the vehicle body.

[0088] When changing the position detection device 100 to a non-use position, the worker first removes the bolts and nuts that secure the second end 330 of the support frame 300 to the second connecting portion 500. This allows the support frame 300 to rotate to the non-use position.

[0089] Next, the worker stands on the left side of the cabin 10 (the side where the regulating pin 335 etc. is located) and grasps the left portion of the support frame 300 (for example, the second portion 312). Since the support frame 300 extends to the left of the pillar 12, the worker can easily grasp the support frame 300 from the side (left side) of the cabin 10.

[0090] Next, the operator rotates the gripped support frame 300 to a non-use position. At this time, frictional force is applied to the support frame 300 by the friction force application mechanism 430. This suppresses rotation of the support frame 300 due to its own weight (unintended rotation). As the support frame 300 rotates, the regulating pin 335 moves along the arc-shaped portion of the second support piece 522.

[0091] Furthermore, as the support frame 300 rotates, the first end 320 and the second end 330 slide against the second support piece 422 and the second support piece 522, respectively. In this embodiment, since the first end 320 and the second end 330 are formed in a substantially circular shape when viewed from the side, unlike when each end is formed in an irregular shape (other than circular), the sliding surfaces of the second support piece 422 and the second support piece 522 are always covered by the first end 320 and the second end 330 (regardless of the rotational position of the support frame 300). As a result, even if the paint on the second support piece 422 and the second support piece 522 peels off due to the sliding of the first end 320 and the second end 330, the peeled areas can be made less noticeable.

[0092] As shown in Figure 10, when the support frame 300 is rotated to the unused position, the restricting pin 335 of the support frame 300 comes into contact with the second restricting portion 522d of the support member 420, thereby restricting further rotation of the support frame 300 in the left side view counterclockwise direction when viewed from the left side in the unused position.

[0093] In this embodiment, the operability of rotating the support frame 300 can be improved by operating the support frame 300 from the left side. Specifically, since the left side of the support frame 300 is provided with a regulating pin 335, a first regulating part 522c, and a second regulating part 522d, it is easy to visually confirm the contact of the regulating pin 335 with the first regulating part 522c and the second regulating part 522d when operating the support frame 300 from the left side.

[0094] Next, the worker secures the second end 330 of the support frame 300 in the unused position to the second connecting portion 500 using bolts and nuts. This completes the repositioning of the position detection device 100 to the unused position.

[0095] Figure 10 shows the position detection device 100 in an unused position. In this unused position, the upper end of the position detection device 100, which is fixed to the support frame 300, is located below the upper end of the roof 11 of the cabin 10. In the unused position, the support mechanism 200 can support the position detection device 100 in a way that makes the tractor 1 more compact in the vertical direction. This makes it easier to store and transport the tractor 1 in a garage or the like.

[0096] Next, we will explain the operation of changing the position detection device 100 from an unused position to an unused position.

[0097] The worker first removes the bolts and nuts that secure the second end 330 of the support frame 300 to the second connecting portion 500. This allows the support frame 300 to rotate to its working position.

[0098] Next, the worker grasps the main body portion 310 (for example, the second portion 312) of the support frame 300 and rotates the support frame 300 to the position of use. At this time, frictional force is also applied to the support frame 300 by the frictional force application mechanism 430.

[0099] As shown in Figure 9, when the support frame 300 is rotated to the operating position, the restricting pin 335 of the support frame 300 comes into contact with the first restricting portion 522c of the support member 420, thereby restricting further rotation of the support frame 300 in the operating position in the left side view clockwise.

[0100] Next, the worker fixes the second end 330 of the support frame 300 at the usage position to the second connecting part 500 using bolts and nuts. This completes the repositioning of the position detection device 100 to the usage position.

[0101] In this embodiment, the support frame 300 is fixed only on the left side (the second end portion 330 and the second connecting portion 500) with bolts and nuts. This allows the entire rotation of the support frame 300 to be performed on the left side only. As a result, the worker does not need to move to both the left and right sides of the support frame 300 to fix it, reducing the burden on the worker. It also helps to prevent forgetting to fix one side.

[0102] Furthermore, in this embodiment, a fixing hole for the usage position (first fixing hole 332) and a fixing hole for the non-usage position (second fixing hole 333) are formed in the second end portion 330, and a fixing hole (fixing hole 522b) common to both the usage position and the non-usage position is formed in the second support piece portion 522. As a result, unlike when fixing holes for the usage position and the non-usage position are formed on the second support piece portion 522 side, the fixing positions of the bolt and nut are common to both the usage position and the non-usage position. This improves the workability of the bolt and nut fixing work.

[0103] Furthermore, the relationship between the wiring 110 of the position detection device 100, the outlet 13a of the cabin 10, and the support frame 300 will be explained below using Figures 5, 11, and 12.

[0104] The wiring 110, which is routed to the outside of the cabin 10 via the outlet 13a of the beam 13, is arranged along the main body 310 (first part 311) of the support frame 300, as shown in Figure 5, and connected to the right side of the position detection device 100. The wiring 110 can be fixed to the main body 310 using appropriate cable ties or the like.

[0105] The cover portion 350 of the support frame 300 has a space that penetrates in the left-right direction, formed by the lower cover portion 351 and the upper cover portion 353. The cover portion 350 can protect the wiring 110, which is arranged along the main body portion 310 (first portion 311), by covering it from above or by inserting it into the space.

[0106] Furthermore, as shown in Figure 11, the outlet 13a is positioned near the pivot axes 322 and 336 of the support frame 300. Specifically, in a side view, both the outlet 13a and the pivot axes 322 and 336 are positioned so that at least a portion of them overlaps with the support member 420 (second support piece 422) of the second connecting portion 500.

[0107] Furthermore, Figure 12 shows a virtual line L1 connecting the axis P1 of the pivot shafts 322 and 336 and the side view center P2 of the first portion 311 (the left-right central part of the first portion 311) of the support frame 300 in use. Also, a virtual line L2 is shown connecting the axis P1 and the side view center P3 of the first portion 311 of the support frame 300 in non-use position. In this embodiment, the outlet 13a is positioned in the region between the virtual lines L1 and L2 behind the axis P1 in a side view (right side view).

[0108] This makes it possible to suppress the load applied to the wiring 110 as the position of the position detection device 100 changes. In other words, by setting the outlet 13a of the wiring 110 near the pivot axes 322 and 336 of the support frame 300, it is possible to prevent excessive tension from being applied to the wiring 110 as the support frame 300 rotates.

[0109] As described above, the tractor 1 (work vehicle) according to this embodiment is A position detection device 100 capable of detecting the position of the vehicle body, A support frame 300 supports the position detection device 100 and is positioned to extend across the left and right pillars 12 of the cabin 10, The support frame 300 is rotatably connected to each of the left and right pillars 12 by connecting parts (first connecting part 400, second connecting part 500), It is equipped with the following features.

[0110] This configuration allows for easy repositioning of the position detection device 100. Specifically, by positioning the support frame 300 across the left and right pillars 12 of the cabin 10, it becomes easier to access the support frame 300 from the side of the cabin 10, facilitating the rotation of the support frame 300 (changing the position of the position detection device 100).

[0111] Furthermore, the support frame 300 is Both ends are positioned to be further outward than the left and right pillars 12.

[0112] This configuration allows the position of the position detection device 100 to be easily changed. Specifically, by positioning the support frame 300 so that both ends are located outside the left and right pillars 12, it becomes easier to rotate the support frame 300.

[0113] Furthermore, the connecting portion is The fixing members 410 and 510 are fixed to the pillar 12, Support members 420 and 520 are attached to the aforementioned fixing members 410 and 510 and rotatably support the support frame 300, It is equipped with the following features.

[0114] This configuration makes it easier to rotate the support frame 300. Specifically, by dividing the connecting parts (first connecting part 400, second connecting part 500) into fixing members 410, 510 and support members 420, 520, the mounting positions of the support members 420, 520 relative to the fixing members 410, 510 can be finely adjusted. By finely adjusting the mounting positions of the support members 420, 520 in accordance with the misalignment of the axes at both ends of the support frame 300 that spans the left and right sides of the cabin 10, the support frame 300 can be easily rotated.

[0115] Furthermore, the connecting portion is A first connecting portion 400 is provided which connects one end of the support frame 300 to one of the left and right pillars 12 so as to be rotatable, A second connecting portion 500 is provided which connects the other end of the support frame 300 to the other of the left and right pillars 12 so as to be rotatable, Includes, The first connecting portion 400 is, The support frame 300 has a first support hole (support hole 422a) through which one end of the support frame 300 is inserted and which rotatably supports the other end of the support frame 300. The second connecting portion 500 is, The support frame 300 has a second support hole (support hole 522a) which has an inner diameter larger than the inner diameter of the first support hole (support hole 422a), through which the other end of the support frame 300 is inserted, and which rotatably supports the other end of the support frame 300.

[0116] This configuration makes it easier to rotate the support frame 300. Specifically, by making the inner diameter of the second support hole (support hole 522a) larger than the inner diameter of the first support hole (support hole 422a), it is possible to allow misalignment of the axes at both ends of the support frame 300 that span the left and right sides of the cabin 10, making it easier to rotate the support frame 300.

[0117] Furthermore, the device is equipped with a friction force applying mechanism 430 provided in the connecting portion (first connecting portion 400, second connecting portion 500) for applying friction force to the rotation of the support frame 300.

[0118] This configuration makes it easier to adjust the position of the position detection device 100. In other words, by applying frictional force to the rotation of the support frame 300, rotation of the support frame 300 due to its own weight (unintended rotation) can be suppressed.

[0119] Furthermore, the friction force application mechanism 430 is Of the first connecting portion 400 and the second connecting portion 500, this is provided only in the first connecting portion 400.

[0120] This configuration allows for the effective application of frictional force. Specifically, the frictional force application mechanism 430 is provided in the first connecting portion 400, which has a relatively small inner diameter for the first support hole (support hole 422a), of the two connecting portions 400 and 500. This allows the support frame 300 to rotate precisely on the side where the frictional force application mechanism 430 is provided, thanks to the relatively small inner diameter of the first support hole (support hole 422a). This suppresses shaft wobble on the side where the frictional force application mechanism 430 is provided, and allows for the effective application of frictional force.

[0121] Furthermore, of the first connecting portion 400 and the second connecting portion 500, only the second connecting portion 500 is provided with a restricting portion (first restricting portion 522c, second restricting portion 522d) that restricts the rotation of the support frame 300 to a predetermined position.

[0122] This configuration makes it easier to adjust the position of the position detection device 100. In other words, by restricting the rotation of the support frame 300 at a predetermined position, it becomes easier to adjust the position detection device 100 to a predetermined position. Furthermore, unlike, for example, the case where restricting parts (first restricting part 522c, second restricting part 522d) are provided on both the left and right sides, it is possible to suppress the shift in the restricted position of the support frame 300 due to the positions of the left and right restricting parts being misaligned with each other.

[0123] In this embodiment, regulating parts (first regulating part 522c and second regulating part 522d) are provided on the left side, which is the side from which the operator performs the operation. This makes it easier for the operator to visually confirm the contact of the regulating pin 335 with the first regulating part 522c and the second regulating part 522d when operating the support frame 300.

[0124] Also, Tractor 1 (work vehicle) The cabin 10 is provided with an outlet 13a for bringing wiring 110, which is connected to the position detection device 100, from the inside of the cabin 10 to the outside. The aforementioned outlet 13a is These are positioned near the pivot axes 322 and 336 of the support frame 300.

[0125] This configuration makes it possible to suppress the load applied to the wiring 110 as the position of the position detection device 100 changes. Specifically, by setting the outlet 13a of the wiring 110 near the pivot axes 322 and 336 of the support frame 300, it is possible to prevent excessive tension from being applied to the wiring 110 as the support frame 300 rotates.

[0126] Furthermore, the support frame 300 is provided with a cover member (cover portion 350) that covers at least a part of the wiring 110.

[0127] By configuring it in this way, the wiring 110 can be protected.

[0128] Furthermore, the support frame 300 is It is formed in an asymmetrical shape.

[0129] This configuration increases the design flexibility of the work vehicle (tractor 1). In other words, the shape of the support frame 300 can be arbitrarily changed to avoid interference with other components.

[0130] Furthermore, the support frame 300 is It comprises a main body portion 310 formed from a rod-shaped member, The main body portion 310 is, It is bent to avoid contact with muffler 4a.

[0131] This configuration makes it possible to avoid interference between the support frame 300 and the muffler 4a.

[0132] Furthermore, the tractor 1 according to this embodiment is one form of implementation of the work vehicle according to the present invention. Furthermore, the support hole 422a according to this embodiment is one form of the first support hole according to the present invention. Furthermore, the support hole 522a according to this embodiment is one form of the second support hole according to the present invention. Furthermore, the first regulating section 522c and the second regulating section 522d in this embodiment are one form of the regulating section according to the present invention. Furthermore, the cover portion 350 according to this embodiment is one form of the cover member according to the present invention.

[0133] Although one embodiment of the present invention has been described above, the present invention is not limited to the above configuration, and various modifications are possible within the scope of the invention as described in the claims.

[0134] For example, the above embodiment shows an example in which both ends of the support frame 300 are positioned outside the left and right pillars 12, but the embodiment is not limited to this configuration. For example, both ends of the support frame 300 may be positioned inside the left and right pillars 12 (for example, in the vicinity of the left and right pillars 12).

[0135] Furthermore, although the above embodiment shows an example in which the first connecting portion 400 and the second connecting portion 500 are composed of fixing members 410, 510 and support members 420, 520 which are separate components, the embodiment is not limited to this configuration. For example, the fixing members 410, 510 and the support members 420, 520 may be formed integrally.

[0136] Furthermore, although the above embodiment shows an example in which the inner diameter of the support hole 522a of the second connecting portion 500 is formed to be larger than the inner diameter of the support hole 422a of the first connecting portion 400, the embodiment is not limited to this configuration. For example, the inner diameters of the support holes 422a and 522a may be formed to be the same size. Alternatively, the inner diameter of the support hole 422a of the first connecting portion 400 may be formed to be larger than the inner diameter of the support hole 522a of the second connecting portion 500.

[0137] Furthermore, although the above embodiment shows an example in which the friction force application mechanism 430 is provided only on the right-side first connecting portion 400 of the support mechanism 200, the invention is not limited to this configuration. For example, the friction force application mechanism 430 may be provided only on the left-side second connecting portion 500. In this way, when the friction force application mechanism 430 is provided only on the side (left side) where the operator performs the rotational operation, it is possible to make the right side of the support frame 300 (where the friction force application mechanism 430 is not provided) follow the rotational operation of the left side of the support frame 300. This makes it possible to suppress differences in the rotation of both ends of the support frame 300. Alternatively, the friction force application mechanism 430 may not be provided on either the first connecting portion 400 or the second connecting portion 500.

[0138] Furthermore, although the above embodiment shows an example in which the first restricting portion 522c and the second restricting portion 522d are provided only on the left-side second connecting portion 500 of the support mechanism 200, the embodiment is not limited to this configuration. For example, the first restricting portion 522c and the second restricting portion 522d may be provided only on the first connecting portion 400, or both the first connecting portion 400 and the second connecting portion 500 may be provided with the first restricting portion 522c and the second restricting portion 522d. In this case, the first end portion 320 shall also be provided with a projection 334 and a restricting pin 335. Alternatively, the first restricting portion 522c and the second restricting portion 522d may not be provided on either the first connecting portion 400 or the second connecting portion 500. In this case, the second end portion 330 shall not be provided with a projection 334 and a restricting pin 335.

[0139] Furthermore, although the above embodiment shows an example in which the outlet 13a for the wiring 110 is located near the pivot axes 322 and 336 of the support frame 300, the embodiment is not limited to this configuration. The outlet 13a for the wiring 110 can be located at any position in the cabin 10.

[0140] Furthermore, although the above embodiment shows an example in which the main body portion 310 of the support frame 300 is bent to avoid contact with the muffler 4a, the embodiment is not limited to this configuration. For example, the main body portion 310 may not be bent as described above. In this case, the support frame 300 (main body portion 310) may be formed in a symmetrical shape.

[0141] Furthermore, in the above embodiment, a fixing hole for the usage position (first fixing hole 332) and a fixing hole for the non-usage position (second fixing hole 333) are formed in the second end portion 330, and a fixing hole common to both the usage position and the non-usage position (fixing hole 522b) is formed in the second support piece portion 522. However, the embodiment is not limited to this configuration. For example, a common fixing hole may be formed in the second end portion 330, and a fixing hole for the usage position and a fixing hole for the non-usage position may be formed in the second support piece portion 522, respectively.

[0142] Furthermore, in the above embodiment, only the left side of the support frame 300 (the second end portion 330 and the second connecting portion 500) is fixed with bolts and nuts, but the configuration is not limited to this. For example, both sides of the support frame 300 (the first end portion 320 and the second end portion 330) may be fixed to the first connecting portion 400 and the second connecting portion 500 with bolts and nuts. It is also possible to configure the support frame 300 to be fixed only on the right side (the first end portion 320 and the first connecting portion 400) with bolts and nuts.

[0143] Furthermore, in the above embodiment, the first end 320 and the second end 330 of the support frame 300 are formed in a substantially circular shape, but the embodiment is not limited to this. For example, the first end 320 and the second end 330 may be formed in an irregular shape (e.g., a polygonal shape).

[0144] Figure 13 shows another embodiment (modification) of the present disclosure. In this modification, unlike this embodiment (see Figure 2, etc.), the friction force application mechanism 430 is provided only on the second connecting portion 500 on the left side. Also in this modification, unlike this embodiment (see Figure 2, etc.), the first end 320 and the second end 330 of the support frame 300 are formed in a substantially polygonal shape (substantially shaped, etc.). Also in this modification, unlike this embodiment (see Figure 2, etc.), both sides of the support frame 300 (first end 320 and second end 330) are configured to be fixed to the first connecting portion 400 and the second connecting portion 500 with bolts and nuts.

[0145] Furthermore, although a tractor 1 was used as an example of a work vehicle in the above embodiment, the embodiment is not limited to this. For example, the work vehicle may be other agricultural vehicles, construction vehicles, industrial vehicles, etc. [Explanation of symbols]

[0146] 1 tractor 100 Position detection device 300 Support Frame 400 First connection part 500 Second connection part

Claims

1. A cabin with a roof, A position detection device capable of detecting the position of the vehicle body, The position detection device is supported by a support frame provided in the cabin, A connecting portion that connects the support frame to the cabin, It is equipped with, Of the support frame, the first portion that supports the position detection device is located in front of both ends in the left-right direction of the support frame that are connected to the connecting portion. Work vehicle.

2. The aforementioned support frame is It comprises a second part formed from a rod-shaped member and extending backward from the first part, The work vehicle according to claim 1.

3. The aforementioned support frame is It comprises a third portion formed to extend from the second portion in the left-right direction, The work vehicle according to claim 2.

4. The aforementioned support frame is The position detection device is supported such that it is positioned above the connecting portion. The work vehicle according to claim 1.

5. The aforementioned support frame is In a plan view, the position detection device is supported such that it does not overlap with the sunroof formed on the roof. The work vehicle according to claim 1.

6. The aforementioned support frame is In a plan view, the position detection device is supported such that it does not overlap with the roof. The work vehicle according to claim 1.

7. The aforementioned support frame is The position detection device is supported such that it is positioned above the roof. A work vehicle according to any one of claims 1 to 6.

8. The aforementioned support frame is The position detection device is rotatable between an operating position where it is located above the roof and a non-operating position where it is located below the roof. The work vehicle according to claim 7.

9. The aforementioned support frame is It is positioned so as to span across the left and right pillars that support the roof of the cabin, The work vehicle according to claim 1.

10. The aforementioned connecting portion is The support frame is rotatably connected to each of the left and right pillars. The work vehicle according to claim 9.

11. The cabin is provided with an outlet for routing wiring connected to the position detection device from the inside of the cabin to the outside [Mitsuto and Takagi 1.1] The aforementioned outlet is, In a side view, the support frame is positioned within the region between a first imaginary line connecting the axis of the pivot axis of the support frame and the side view center of the part of the support frame in the usage position, and a second imaginary line connecting the axis of the pivot axis and the side view center of the part of the support frame in the non-usage position. The work vehicle according to claim 8.

12. The support frame is provided with a cover member that covers at least a portion of the wiring, The cover member is The support frame comprises upper and lower cover bodies attached to the upper and lower surfaces of the rod-shaped main body, and a space is formed between the upper and lower cover bodies for inserting the wiring in the left-right direction. The work vehicle according to claim 10.

13. The aforementioned second part is, It is curved to avoid contact with the muffler. The work vehicle according to claim 2.

Images